File Joiner Reassembler
Rejoin split file parts directly in your browser. Validate part order, preview the join plan, and download the reconstructed file without uploading anything.
Upload split file parts
Add the part files created by your splitter. This tool will detect their order and reassemble them into a single file.
Drag and drop part files here
or
Best for files named like original.ext.part-1-of-N
Parts Loaded
0
Total Input Size
0 B
Expected Parts
—
Reassembly settings
Validation summary
Base Name
—
Missing Parts
None
Duplicate Parts
None
Unknown Part Indexes
No
Part order
Review or manually adjust the file part order.
Add split parts to preview and reassemble them here.
What does this file joiner do?
This browser-based tool combines split file parts back into a single output file. It is designed to work with chunked files such as .part-1-of-N style outputs created by file splitters.
How reassembly works
The tool reads each uploaded part, sorts the files by detected part number, checks for missing or duplicate part indexes, and then joins the binary content in order into the original file.
This is useful after splitting large files for storage, upload limits, or transfer workflows.
Private browser-based reassembly
Your file parts stay on your device while reassembly runs in your browser. Nothing is uploaded to a server.
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